Question

A horizontal bar has mass 5 kg, length 0.30 m and has a mass M at one end as shown in the accompanying schematic sketch. A cable is attached at point A, 0.05 m from the pivot point (fulcrum) P and its other end makes a negligible angle with the a rod joined to the pivot P. The top end of the rod is fixed to the roof. The maximum tension the cable can withstand is 1050 N. Then (A) the maximum value of M is 15 kg. (B) this design has the maximum mechanical advantage. (C) the maximum value of the horizontal component of the force at the pivot is 1050 N. (D) the maximum value of the normal component of the force at the pivot is 850 N.
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Answer 1

Correct options are

A) The maximum value of M is 15 kg

and

D) The maximum value of the normal component of the force at the pivot is 850 N